<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script>
			
			/* let n = 3*5;
			alert(n)
			let m = 4;
			m = m / n;
			alert(- m) */
			//++ 递增
			//-- 递减
			let m  = 3;
			console.log(m++); // m = m+1
			console.log(m);
	console.log('===========================================');
			let n = 3;
			console.log(++n) // n = n+1
			
			
		</script>
	</body>
</html>